Bedstead-fastemtna



UNITED sTATEs PATENT oEEIoE.

JOHN D. SANBORN, OF BENNINGTON, NEW YORK.

BEDSTEAD-FASTENING.

Specification of Letters Patent No. 6,275, dated April 3, 1849.

To all whom i?? may concern.'

Be it known that I, JOHN D. SANBORN, of Bennington, in the county ofWyoming and State of New York, have invented a new and usefulImprovement in the Fastenings of Bedsteads, which is described as follows, reference being had to t-he annexed drawings of the same, makingpart of this specification.

Figure l, is a perspective view of one of y the posts of the bedstead,and the fastenings on the ends of the rails, to which it is to besecured. Fig. 2, is a horizontal section through one of the posts, andcenter of the fastenings, and ends of the rails in which they aresecured-the rails in this case being connected together in their properrelation to the post. Fig. 3, is a plan of one of the spiral beveledcastings, secured on the ends of the cross rails.

Similar letters in the figures refer to corresponding parts.

The nature of this invention and improve ment consists in securing therails of the bedstead to the posts, by means of castings secured in theends of the rails, and entering suitable openings communicating witheach other in the posts, the castings on the ends of the cross railsbeing enlarged where they enter the mort-ises in the posts andperforated with openings having spiral bevel edges, through which theends of the castings in the ends ofthe side rails, pass, and on thespiral bevel edges of which the inclined edges of angular wings orprojections on said side rail castings press when the side rails areturned toward each other, after the manner of a screw, causing the endrails to be drawn flush with the sides of the post, and at the same timeproducing a like effect on the side rails.

The shanks A, or ends of the castings, inserted in the ends of the crossrails B, are made round, with wings C, on either side, to prevent themfrom turning, to oorrespond in form with the aperture in the rails fortheir reception, and are held firmly by bolts or pins D, passing throughthe rails and through openings in their ends. The outer ends A, of thecastings in the cross rails, are of the form approximating to that of asemi-circle, in cross section, of a radius equal to three times theradius of the shank, being bilged or tapered outward gradually, from theends of the rails to within abo-ut onehalf the distance to their ends,when they assume the semi-circular form above stated. They are scallopedon their semi-circular part through to the opposite surface, in such amanner as to form an opening E, of an oval shape on that surface, and aspiral bevel edge F, on the sides of the scallop or cavity formed, saidspiral bevel commencing at a, and extending around in the formrepresented in Fig. 3 to F, where it terminates.

Two tongues G or flanges are cast near the ends of these beveledcastings, which tongues enter corresponding grooves H formed in theopenings in the posts I, for preventing the cross rails turning eitherWay.

The castings A2 on the ends of the side rails L, are inserted into, andsecured to said rails in a similar manner to those before mentioned, andare the same diameter from end to end.

An angular projection or tooth M, is formed near their outer ends,somewhat similar in form to a right angled triangle, being slightlyrounded on its inclined edge to correspond with the spiral beveled edgeF of the casting A', and tapered on the sides from the main part, to thepoint.

Round tenons N, are formed on the ends of the rails, corresponding insize with the openings in the posts in which they are inserted. Those onthe side rails are longer than those on the cross rails, as they forniwith the ends A4 of the castings--which ends AL enter small openings O,formed in the larger ones-bearings, upon which the side rails move.

The spiral bevel edges .F, on the castings of the cross rail at one endof the bedstead, will of course have a counter spiral to those on thecross rail at the opposite end.

The bedstead is put together in the following described manner. Afterthe castings A on the cross rails B, are inserted in their properopenings in the posts, the castings A2 on the side rails L, are insertedin Vtheir respective openings, their ends A4 entering the small openingsO. vThe side rails are then turned toward eachV other, whichpresses theinclined edgesof the angular projections M, on the side rail castingsagainst the spiral bevel surfaces of the I do not claim the invention ofthe open hook-lock, suoh as Gannt uses, crossed at right angles, havinga beveled hook on one of the tenons, and a beveled projection and swellon the other and large cast iron tenons that enter the posts, but

What I do claim as my invention and improvement on Gannts patentedbedstead fastening and desire to secure by Letters Patent is Making anoval opening through the tenon of the end rails through which the tenonon the side rail is passed and :forming a spiral bevel around vsaidopening against which the beveled projection on the tenon of the siderail acts in the manner of a screw, as it is turned, causing the twotenons thus interlooked to act in perfect unison and to draw theshoulders oi the end and side rails simultaneously against the sides ofthe posts and to make perfect joints, without the liability of breakingthe spiral bevelssaid bevels being of great strength arising from theircontinuous and unbroken form-the parts sustaining each other around theoval opening.

'JOHN D. SANBORN. Witnesses:

B. R. FoLsoM, JOHN B. FoLsoM.

